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Thread: replace union

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    replace union

    Hello - The union on my pump is leaking a good amount of water that i believe is affecting the pressure as well. What is the step by step process to replace this? i am pretty handy but this is my first attempt at replacing pool plumbing.





    Also- you can see a coupling downstream of the pump. A specific question would be where is best to cut this pipe to replace the fittings? should i cut past the coupling or before it?
    25,000 gallons (in-ground plaster pool+spa)
    Hayward DE Filter, 1.5 hp pump, Polaris 3900 Sport Vacuum, Honeywell Heater
    TF-100 Test Kit, Using TroubleFree Method
    Getting the hang of pool ownership....

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    Mod Squad woodyp's Avatar
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    Re: replace union

    No need for that straight line coupler to be there..........may have been in the past. Hacksaw, tape measure, sand paper, pvc glue and cleaner and you're done.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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    duraleigh's Avatar
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    Re: replace union

    I can't see a union in your pic???? Are you talking about the adapter (white) that goes into your pump body?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

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    Re: replace union

    Yes
    25,000 gallons (in-ground plaster pool+spa)
    Hayward DE Filter, 1.5 hp pump, Polaris 3900 Sport Vacuum, Honeywell Heater
    TF-100 Test Kit, Using TroubleFree Method
    Getting the hang of pool ownership....

  5. Back To Top    #5
    Mod Squad woodyp's Avatar
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    Re: replace union

    That's where a half union needs to be then.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  6. Back To Top    #6

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    Re: replace union

    Where should I cut the exisitkng pipes?
    25,000 gallons (in-ground plaster pool+spa)
    Hayward DE Filter, 1.5 hp pump, Polaris 3900 Sport Vacuum, Honeywell Heater
    TF-100 Test Kit, Using TroubleFree Method
    Getting the hang of pool ownership....

  7. Back To Top    #7
    Mod Squad woodyp's Avatar
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    Re: replace union

    On the filter side of that straight line coupler.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

  8. Back To Top    #8

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    Re: replace union

    Ok great. Should I just put another couple in then?
    25,000 gallons (in-ground plaster pool+spa)
    Hayward DE Filter, 1.5 hp pump, Polaris 3900 Sport Vacuum, Honeywell Heater
    TF-100 Test Kit, Using TroubleFree Method
    Getting the hang of pool ownership....

  9. Back To Top    #9
    Smykowski's Avatar
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    Re: replace union

    I'd put a full union there instead. You'll thank yourself the first time you need to do any pump maintenance.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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